Binding post



Nov. 7, 1944. .1.v c. DAwsoN, JR 2,362,118

BINDING PosT Filed Feb. 18, 1945 lfm-155 C. DA w50/Ja drm @M5/5.

Patented Nov. 7, 1944 UN-lfrfao STA-ras PATENT .o FF-ics assaiisj :tiNmNG Pos'r James;C. Da,wson, Jr., .IIirkvvoorlp Mo.

-appiieationirebmny is, 1:94a, sermones-usan ,2. Claims.

The-present' invention-relates to a'bindingpt Yof 'plastic material fforiloose` leaf booksrand'f'more Jparticularly to a .novel e construction including most, vholding elements .forbook covers, rand a i Elockgwashenadapted-to' cooperaterwithfonevdfithe holding :elements and y-the lpost to 'l accommodate .a Ibook: orA varying i thickness. i

.A particularobjectofithe invention :is :to proivide ia post adapted to :present .,a-smootnssurface to fthe leaves'` to beinserted in lathe ibook.

i .A1 further` object is to: provide v'aibindingeelemerlt having Ulimitedv rotary movementvwithfrespectfito `the post, but :adapted `to. vfble vlocked .fatfany point ialongrthe length :of thelpost. 4

. Ax further/object of `fthe :invention iis to :provide a, binding post and associatedpartsfofflight material, such ias plastic, that is available at the present time.

In the drawing:

Fig. 1 is a top view of a book with binding posts in position;

Fig. 2 isa sectional view drawn on the line 2-2 of Fig. 1;

Fig. 3 is a sectional view on the line 3-3 of Fig. 1;

Fig. 4 is a sectional view on the line 4-4 of Fig. 3;

Fig. 5 is a view of the top of the cover binder;

Fig. 6 is a bottom plan view of the binding element without the lock washer; and,

Fig. 7 is a vertical sectional view of the bindl ing element without the lock washer.

' a desired number of loose leaves.

In Fig. 2 there is shown a top cover IIJ of a conventional loose leaf book, and a bottom cover Il.

The covers include a foundation 2| of wood or other fairly stable material, and a covering 22, which may be of cloth or imitation leather, and is cemented tothe foundation in the conventional manner.

At I5 the tcp cover I0 is hingedly attached to a clamping member I2 by means of the covering 22, which covers the clamping member I2 in the same manner as it does the member I0.

The construction of the bottom cover, in general is similar to that of the top cover. The assembled book will include the conventional holes extending through the leaves.

Binding posts 32 have circular base heads 3I :.adaptedtolbereceivedE in-'annularfslots 130 fin the 'foundation Aofi'zhevmemberl I3, dogs 35 adapted'to `be wedged into the foundation of the member I3, and threads 42 to engage threadsf4Lo`f internally sthreadedfringsid. 'I'husrthe posts32 are securely 'held inrthe memberrIlS `against any-'possiblemove- `ment with:reference.to that member.

Eachxo'f the posts V32 :hasfa'longitudinally extending "groove 6:0 :andy aflongitudinally extending .threadedzse'gment FGI adjacent .the groove. IThe fcombine'dy grooves and `threaded segments kto- .gather Voccupy180 or'less of the surface ofthe rpost.

'.'Iheinnerv surfaceof'therportion I2 has annular idepressionsz45ito: receive'the split lock washers 46.

Eachrofthebinding-elements 49 `consisI-.sof a fhead50 having. lprojecting ears'5l 'againstwhic'h i the ingersmay :exert `va itwisting effort, and a lower extending sleeve 52. A dog 53 is adapted to move oscillatably in a keyhole slot 55 of the portion I2. The sleeve 52 has a groove 56 to receive the projecting lip 51 of a split lock washer 46. 'I'he lock washer 46 is adapted to expand over the end of the sleeve 52, until its lip engages a groove in the sleeve, into which it springs. This Washer permits rotary movement of the binding element but prevents axial displacement thereof out of the element I2.

On the inner circumference of the element 49 there is a threaded segment 65. The threads in this segment are in the preferred formy heavier than the threads in the segment 6I so that upon engagement, there is a binding action between the two. For many conditions, however, adequate binding is effected by the expanding forces of the leaves, particularly when plastics are used for the elements.

Operation Upon installation of the posts, they are secured to the portion I3 by means of the elements 40 and 3|, securely imbedded therein. There is no chance here of movement either angularly or longitudinally. The posts are inserted so that the threaded portions and groove portions face inwardly and toward each other. The sheets are then placed over the posts. By the stated disposition of the posts, the sheets are not frayed or torn by contacts with the threaded portions of the posts, nor may they be displaced relative to each other by engagement with the irregular surfaces.

The upper cover is then placed over the sheets, with the binding elements turned so that their threaded segments engage in the grooves 60,

with the friction caused by the expanding pressure of the sheets, which the compressed book exerts, secure a locking action which would only.

be released by the application of a decided twisting effort exerted against the ears 5 l.

What is claimed is:

1. A binding post for a loose leaf book comprising means for' locking one end immovably in a book cover, the main body of said post havingy two adjacent longitudinal segments, one of said segments being threaded, the other segment being grooved, and a means for locking another book cover in any position longitudinally of said post, said means comprising a large ring, a collar projecting therefrom, a dog projecting from said collar, said collar being grooved near theinner end, and a split lock washer having an inwardly projecting lip adapted to expand over the end of said collar and to spring into the groove thereof, said ring having an internal threaded portion, said portion having an angular width no greater than that of the grooved segment, whereby upon disposition of the portion in the groove the means may be displaced longitudinally on the post, the internal threads on said portion being larger than the threads on said post, the threads of said portion being engageable with the threaded segment upon angular movement of the ring about the post, said engagement being adapted to hold the ring against axial displacement on the post, and means limiting the angular movement of the ring on the post to the compass of said segment.

2. A binding post for a loose leaf book comprising means for locking one end immovably in a book cover, a main body, said body having two longitudinal adjacent segmentsone of said segments being threaded, the other being grooved, a second book cover, and a means for locking said second book cover in any position longitudinally of said post, said secondbook cover havl, ing a hole, a portion of said hole being of larger diameter than the rest of said hole, and a locking means adapted to extend into said hole and outside of said cover comprising a ring, a collar, and a lock washer adapted to t into the portion of said hole of larger diameter than the rest of said hole, said ring having an internal threaded portion, said portion having an angular width no greater than that of the grooved segment, whereby upon disposition of the portion in' the groove the means may be displaced longitudinally on the post, and means limiting angular movement of the ring on the post to the arc of the post included by the longitudinal segments thereon, the threads on 'said post and on said ring being of different size and thereby being adapted upon meshing with each other to bind said locking means and said post, said' limiting means including a dog projecting from said collar and restricting the angularv movement of said locking means with respect to said second book cover to the arc of the enlarged portion of the hole in said book cover, the inner end of said collar being shaped to receive said lock'washer.

JAMES C. DAWSON, JR. 

